The present invention relates to a beer manufacturing device configured such that it is possible to directly produce and sell beer, the yeast of which is alive, on the spot without any expertise, and it is possible to easily manufacture various kinds of beer automatically at a low cost through a single session without a concern that the same will be contaminated by contact with the outside. A beer manufacturing device according to an embodiment of the present invention may comprise: a chamber; a coupler fixedly installed in the chamber, the coupler comprising a wort channel and a gas channel; a channel portion connecting the wort channel and the gas channel of the coupler; a sterilizing/washing cap coupled to the coupler such that the channel portion becomes a closed channel; a sterilizing/washing filter container connected to the channel portion, sterilizing/washing water being stored in the sterilizing/washing filter; a pump connected to the channel portion; and a control portion for controlling the operation of the pump such that the sterilizing/washing water stored in the sterilizing/washing filter container circulates through the channel portion that has become a closed channel.